AHC: Greater Russia\Soviet Union restored

The challenge is to have a Greater Russia or Soviet Union, with the full territorial extent of the pre-1991 USSR (possibly minus the Baltics and\or East Prussia), restored by either peaceful or military means after 1991.
 
Didn't Pellegrino Shot's Zhirinovsky's Russian Empire accomplish this? A de facto Greater Russia in the form of the Union of Independent States could have been what you're looking for.Other than that, the key to this is the New Union treaty being signed.
 
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